Merge the 2021-08-05 SPL branch from AOSP-Partner

* security-aosp-pi-release:
  RESTRICT AUTOMERGE Fix unable to send file via OPP
  RESTRICT AUTOMERGE Fix bluetooth settings will broadcast to anywhere when some cases
  Prevent drawing on top of DevicePickerActivity
  Prevent HTML Injection on the Device Admin request screen

Change-Id: I665d66f5242b9a3b075af2ce656d4a7597c2a912